kopia lustrzana https://github.com/f4exb/sdrangel
74 wiersze
1.5 KiB
C++
74 wiersze
1.5 KiB
C++
// Copyright 2020 Mobilinkd LLC.
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#pragma once
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#include "Util.h"
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#include <algorithm>
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#include <array>
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namespace modemm17
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{
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template <size_t F1= 45, size_t F2 = 92, size_t K = 368>
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struct PolynomialInterleaver
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{
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using buffer_t = std::array<int8_t, K>;
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using bytes_t = std::array<uint8_t, K / 8>;
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alignas(16) buffer_t buffer_;
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size_t index(size_t i)
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{
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return ((F1 * i) + (F2 * i * i)) % K;
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}
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void interleave(buffer_t& data)
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{
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buffer_.fill(0);
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for (size_t i = 0; i != K; ++i)
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buffer_[index(i)] = data[i];
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std::copy(std::begin(buffer_), std::end(buffer_), std::begin(data));
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}
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void interleave(bytes_t& data)
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{
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bytes_t buffer;
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buffer.fill(0);
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for (size_t i = 0; i != K; ++i)
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{
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assign_bit_index(buffer, index(i), get_bit_index(data, i));
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}
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std::copy(buffer.begin(), buffer.end(), data.begin());
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}
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void deinterleave(buffer_t& frame)
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{
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buffer_.fill(0);
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for (size_t i = 0; i != K; ++i)
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{
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auto idx = index(i);
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buffer_[i] = frame[idx];
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}
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std::copy(buffer_.begin(), buffer_.end(), frame.begin());
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}
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void deinterleave(bytes_t& data)
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{
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bytes_t buffer;
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buffer.fill(0);
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for (size_t i = 0; i != K; ++i)
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{
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assign_bit_index(buffer, i, get_bit_index(data, index(i)));
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}
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std::copy(buffer.begin(), buffer.end(), data.begin());
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}
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};
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} // modemm17
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